Plate, plate assembly and heat exchanger

ABSTRACT

The present disclosure relates to the technical field of heat exchange devices, and in particular, to a plate, a plate assembly and a heat exchanger. The plate comprises a plate body and a first through hole and a second through hole provided on the plate body; the plate body forms a pipe segment around the first through hole, and the second through hole is arranged close to the outer periphery of the pipe segment.

CROSS-REFERENCES TO RELATED APPLICATION

This disclosure claims the priority of the Chinese patent application filed with the Chinese Patent Office on Jun. 27, 2019, with the application number 2019105668924 and entitled “Plate, Plate Assembly and Heat Exchanger”, the entire content of which is incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the technical field of heat exchange devices, and in particular, to a plate, a plate assembly and a heat exchanger.

BACKGROUND ART

In order to realize that the master inlet and the master outlet of the first fluid of the sheet-laminated (stacked) heat exchanger are arranged on the same side (such as, the upper side) of the heat exchanger and at the same time the multiple process sections are achieved, a heat exchanger is adopted in the related art, with the heat exchanger including a submerged tube and a plurality of stacked sheets. The plurality of stacked sheets are stacked on each other, and a first fluid channel and a second fluid channel are formed between the stacked sheets. A plurality of first through holes are provided on the stacked sheets, and a plurality of first through holes can form a channel communicating with the first fluid master inlet for introducing the first fluid. The submerged tube is inserted into the channel and extends to the bottom of the channel, so that the first fluid enters the first fluid channel from the bottom of the channel. Through providing a steering device, the first fluid is made to flow through the multiple first fluid channels of the heat exchanger in a meandering manner, and finally is discharged from the first fluid master outlet.

The problem is that the submerged tube inserted in the channel must be welded to not only the stacked sheets, but also the steering device. During the brazing process, the melting of the solder will easily cause each layer of stacked sheet to slide in the stacking direction, which affects the position of the assembling of the submerged tube, or affects the assembly accuracy of the submerged tube, such as, verticality, which causes that it is difficult to guarantee the welding quality (circular welding), and thus the product qualification rate is low.

SUMMARY

The purpose of the present disclosure includes, for example, providing a plate, a plate assembly and a heat exchanger to solve the above technical problems. For example, the embodiments of the present disclosure may be implemented in the following manner.

An embodiment of the present disclosure provides a plate, which may comprise a plate body and a first through hole and a second through hole provided on the plate body, with the plate body forming a pipeline section around the first through hole; and the second through hole can be arranged close to an outer periphery of the pipeline section.

Optionally, the pipeline section may be formed by a flange of an edge of the first through hole.

Optionally, wherein the flange may be of a one-time flanging structure, and the flange may be perpendicular to a plane of the plate body.

Optionally, the flange may be of a second-time flanging structure, and the flange at an end may be parallel to a plane of the plate body.

Optionally, the pipeline section may protrude upwards or protrude downwards.

Optionally, a plurality of second through holes may be provided, and the plurality of second through holes may be arranged around the pipeline section.

Optionally, a ratio of a flow area of the first through hole to a flow area of the second through hole may be not greater than 1:1.

An embodiment of the present disclosure provides a plate assembly, which may comprises two plates provided by the embodiment of the present disclosure, wherein the two plates may be stacked, and the pipeline sections of the two plates may protrude toward each other and realize a surface contact connection.

An embodiment of the present disclosure provides a heat exchanger, which may comprise a plurality of plate assemblies provided by the embodiment of the present disclosure, wherein the plurality of plate assemblies may be provided as stacked; and the pipeline sections in the plurality of plate assemblies may be sequentially communicated to form a first flow channel; and the second through holes in the plurality of plate assemblies may be communicated to form a second flow channel.

Optionally, the heat exchanger may further comprise a first fluid inlet and a first fluid outlet; and the first flow channel can be connected to the first fluid inlet, or the first flow channel can be connected with the first fluid outlet.

Optionally, the first flow channel and the second flow channel may be blocked (separated) from each other in a direction perpendicular to a stacking direction of the plate assembly.

Optionally, the heat exchanger may further comprise a plurality of bottom plates, and the plurality of bottom plates may be stacked and provided below the plurality of plate assemblies, each of the bottom plates may be provided thereon with a third through hole, and the third through holes of the plurality of bottom plates may be communicated to form a third flow channel, and the third flow channel may be communicated to the first flow channel.

Optionally, each of the bottom plates may be further provided with a fourth through hole, and the fourth through holes of the plurality of bottom plates may be communicated to form a fourth flow channel.

Optionally, a turning member may be provided in the fourth flow channel to divide the fourth flow channel into a fifth flow channel and a sixth flow channel in a stacking direction of the plate assemblies, wherein the fifth flow channel may be located above the sixth flow channel.

Optionally, each plate assembly forms one first fluid channel, and each pair of bottom plates forms one first fluid channel; and the plurality of first fluid channels are divided, from bottom to top, into a first channel segment, a second channel segment and a third channel segment.

Optionally, the first channel segment may be located between the third flow channel and a lower part of the sixth flow channel, and the second channel segment may be located between a lower part of the second flow channel and a upper part of the sixth flow channel, and the third channel segment may be located between a upper part of the second flow channel and the fifth flow channel.

Optionally, at least two numbers of number of the first fluid channels of the first channel segment, number of the first fluid channels of the second channel segment and number of the first fluid channels of the third channel segment may be same.

Optionally, number of the first fluid channels of the first channel segment, number of the first fluid channels of the second channel segment and number of the first fluid channels of the third channel segment may be in order of being increased sequentially.

Optionally, one second fluid channel is formed between adjacent plate assemblies, and one second fluid channel is formed between two adjacent bottom plates in pair.

Optionally, the plurality of first fluid channels and the plurality of second fluid channels may be alternately arranged.

The plate provided by the embodiments of the present disclosure can include a plate body and a first through hole and a second through hole provided on the plate body. The plate body can form a pipeline section around the first through hole; the second through hole can be arranged close to an outer periphery of the pipeline section.

During the process of using the plates provided by the embodiments of the present disclosure to produce a heat exchanger, a plurality of plates can be stacked and connected in sequence. During the process of welding a plurality of plates, two pipeline sections, provided as adjacent, can be connected, such as welding. A plurality of pipeline sections are connected to each other to form one integral first flow channel, and the second through holes communicate with each other to form a second flow channel, and the first flow channel and the second flow channel are blocked from each other in a direction perpendicular to the stacking direction of the plates. Compared with inserting a submerged tube in a channel in the related art, in the process of connection of the plates provided in the present disclosure to form the first flow channel, it may be not necessary to maintain a high perpendicularity or assembly accuracy of the pipeline sections at all time during welding, only two adjacent pipeline sections need to be connected to each other, thus having low requirements for assembly accuracy, facilitating welding, making welding easy to operate and easy to control, wherein the welding quality between the two pipeline sections is easy to be guaranteed, thereby being able of improving the pass rate of the heat exchanger.

BRIEF DESCRIPTION OF DRAWINGS

The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure, and the exemplary embodiments and description of the present disclosure are used to explain the present disclosure, and do not constitute an improper limitation to the present disclosure. In the drawings:

FIG. 1 is a schematic structural diagram of a plate according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a pipeline section in the plate shown in FIG. 1;

FIG. 3 is a schematic structural diagram of another pipeline section in the plate shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a plate assembly according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a heat exchanger, which is on the first fluid side, according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of the bottom plate of the heat exchanger shown in FIG. 5;

FIG. 7 is a schematic structural diagram of the plate of the heat exchanger shown in FIG. 5, wherein the plate is located in the plate assembly provided with the cover plate;

FIG. 8 is a schematic structural diagram of the plate of the heat exchanger shown in FIG. 5, wherein the plate is located in the plate assembly provided with a turning member;

FIG. 9 is a schematic diagram of a flow of the first fluid in the heat exchanger provided by the embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a heat exchanger, which is on the second fluid side, according to an embodiment of the present disclosure; and

FIG. 11 is a schematic structural diagram of a heat exchanger according to an embodiment of the present disclosure, which is used in combination with a thermal expansion valve.

In the drawings: 01—plate body; 02—first through hole; 03—second through hole; 04—channel segment; 05—third through hole; 06—fourth through hole; 07—fifth through hole; 08—sixth through hole; 1—plate; 2—bottom plate; 3—first flow channel; 4—second flow channel; 5—third flow channel; 6—fourth flow channel; 7—fifth flow channel 7′—sixth flow channel; 8—cover plate; 9—turning plate; 10—first channel segment; 11—second channel segment; 12—third channel segment; 111—first fluid inlet; 112—first fluid outlet; 113—second fluid inlet; 114—second fluid outlet; 115—connection block; 116—thermal expansion valve.

DETAILED DESCRIPTION OF EMBODIMENTS

It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present disclosure will be described in detail with reference to the drawings and in conjunction with the embodiments.

In the description of the present disclosure, it should be understood that similar reference numbers denote similar items in the following drawings. Therefore, once a certain item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings. At the same time, in the description of the present disclosure, the terms “first”, “second”, etc. are only used for description of the distinguishing, and cannot be understood as indicating or implying importance of relativity or implicitly indicating the number of the indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present disclosure, “plurality” means two or more, unless otherwise specifically defined. As shown in FIG. 1, a plate 1 provided by the present disclosure may include a plate body 01 and a first through hole 02 and a second through hole 03 provided on the plate body 01. Specifically, the plate body 01 may be provided in a rectangular shape. The first through hole 02 and the second through hole 03 may be located at a corner of the plate body 01. The plate body 01 may form a pipeline section 04 around the first through hole 02, that is, the pipeline section is arranged on the first through hole 02. The second through hole 03 may be arranged close to the outer periphery of the pipeline section 04. The arrangement of the first through hole 02, the second through hole 03 and the pipeline section 04 will be described in detail below.

During the process of using the plate 1 provided in this embodiment to produce a heat exchanger, a plurality of plates 1 can be stacked and connected in sequence. In the process of welding the plurality of plates 1, two pipeline sections 04, provided as adjacent, can be connected, such as welding. A plurality of pipeline sections 04 can be connected to each other to form an integral first flow channel 3. A plurality of second through holes 03 can be connected to each other to form a second flow channel 4. The first flow channel 3 and the second flow channel 4 may be blocked from each other in a direction perpendicular to the stacking direction of the plates 1. Compared with inserting a submerged tube in a channel in the related art, in the process of connection of the plates 1 provided in the present embodiment to form the first flow channel, it may be not necessary to maintain a high perpendicularity or assembly accuracy of the pipeline sections at all time during welding, only two adjacent pipeline sections 04 need to be connected to each other, thus having low requirements for assembly accuracy, facilitating welding, and making welding easy to operate and easy to control, wherein the welding quality between the two pipeline sections 04 is easy to be guaranteed, thereby being able of improving the pass rate of the heat exchanger.

Optionally, the section of the first through hole 02 and the pipeline section 04 may be in multiple shapes, such as triangle, quadrilateral, ellipse, circle, or special shape.

Optionally, the structural profile of the second through hole 03 may be in multiple forms, for example, triangular, circular, rectangular, or waist-shaped.

Optionally, the second through hole 03 may be arranged in a fan shape, and the fan shape may be arranged with the center of the first through hole 02 as the circle center, which can make the structure of the plate 1 compact.

The number of the second through holes 03 may be one. Alternatively, the number of the second through holes 03 may be multiple, such as two, three, or four, etc., and a plurality of second through holes 03 may be arranged as surrounding the first through holes 02. A plurality of second through holes 03 are provided such that the first fluid flows at multiple positions, making the flow of the first fluid uniform, avoiding it jamming at one position, and facilitating the circulation of the first fluid.

Optionally, a plurality of second through holes 03 may be evenly distributed around the first through holes 02, which may make the flow rate of the first fluid uniform.

Optionally, it is possible that the ratio of the flow area of the first through hole 02 to the flow area of the second through hole 03 is not greater than 1:1. For example, the ratio of the flow area of the first through hole 02 to the flow area of the second through hole 03 can be 1:1, 1:2, 1:3, 1:4, and so on. Of course, it should be set according to actual needs. Optionally, for the first fluid being a mixed fluid of liquid and gas, during the flowing of the first fluid, when the liquid is converted into gas, the flow rate of the first fluid increases, then if the total flow area of the second through hole 03 is too small, it will affect the turning direction and the heat exchange of the first fluid.

Optionally, the pipeline section 04 and the plate body 01 can be connected in multiple ways. For example, the pipeline section 04 and the plate 1 can be connected by welding, gluing or the like, before the heat exchanger is processed and manufactured. That is, the pipeline section 04 is connected to the edge of the first through hole 02.

Optionally, the pipeline section 04 can be integrally formed with the plate body 01, for example, by casting, avoiding the secondary processing, and thus the connection is reliable.

Optionally, the pipeline section 04 can be formed by the flange of the edge of the first through hole 02. In this embodiment, the flange can be formed by stamping or stretching, and the production process is simple and the processing is convenient.

Optionally, the structure formed by the flange of the edge of the first through hole 02 may be in multiple forms. As an alternative, as shown in FIG. 2, the flange can be of a one-time flanging structure, and the flange can be perpendicular to the plane of the plate body 01. In this embodiment, optionally, the flange can be perpendicular to the plane of the plate body 01. Then, when the two pipeline sections 04 are welded, the sidewalls of the two flanges can be abutted against each other. Welding is formed between two flanges. In this way, the welding area is large, which is convenient for welding, and the side wall of the first flow channel 3 formed by the pipeline section 04 of this structure can be substantially flat, avoiding the protruding part from being formed on the side wall with the protruding part blocking the flowing of the first fluid.

As another alternative, as shown in FIG. 3, the flange can be a secondary flange structure, and the flange at the end can be parallel to the plane of the plate body 01. In this embodiment, when the two pipeline sections 04 are connected, the flanges at two ends can be abutted against each other, and the flanges at the two ends can be welded, which is more convenient for welding and more convenient for operation.

As shown in FIG. 1, optionally, the plate body 01 can be arranged in a U shape, the open end can be an upper end, and the pipeline section 04 can protrude upward and downward, that is, the pipeline section 04 protrudes from the top and the bottom of the plate 1.

Optionally, the pipeline section 04 may also protrude downward only or the pipeline section 04 may also protrude upward only.

As shown in FIG. 4, a plate assembly provided by the present disclosure can include two plates 1 provided by the present disclosure. The two plates 1 can be provided as stacked, and the pipeline sections 04 in the two plates 1 can protrude toward each other, realizing the surface contact connection.

In this embodiment, optionally, the two plates 1 can be arranged in pair, and the pipeline sections 04 of the two plates 1 can protrude toward each other, that is, the pipeline section 04 of one plate 1 can protrude upward, and then the pipeline section 04 of the other plate 1 may protrude downward. Optionally, the two pipeline sections 04 can achieve the surface contact connection. In this way, it is possible to prevent one plate 1 from being excessively stretched to cause the excessive thinness and damage, which is beneficial to the processing and manufacturing of the plate 1.

Optionally, the structure of the pipeline section 04 may be different, and the form of the surface contact connection formed by the two is also different. For example, the pipeline section 04 may be in multiple structures formed by folding the edge of the first through hole 02. As shown in FIG. 2, optionally, the flange may be of a one-time flanging structure, and the flange can be perpendicular to the plane of the plate body 01. In this embodiment, optionally, the flange can be perpendicular to the plane of the plate body 01, so when the two pipeline sections 04 are welded, the side walls of the two flanges can abut against each other, that is to say, they may contact and form a connection surface in the direction same as the stacking direction of the plates 1. Welding can be formed between the two flanges, so that the welding area is large, which is convenient for welding, and the side wall of the first flow channel 3 formed by the pipeline section 04 of this structure can be substantially flat, avoiding the protruding part from being formed on the side wall, with the protruding part blocking the flowing of the first fluid.

As shown in FIG. 3, optionally, the flange can be of a secondary flanging structure, and the flange at the end can be parallel to the plane of the plate body 01. In this embodiment, optionally, when the two pipeline sections 04 are connected, the flanges at the two ends are abutted, and the flanges at the two ends are welded, that is, they contact and form the connection surface in the direction perpendicular to the stacking direction of the plate 1, which is more convenient for welding and more convenient for operation.

It should be noted that, optionally, the plate 1 can be of at least two forms. The pipeline section 04 on one of plates 1 can protrude along the top direction of the plate body 01, and the pipeline section 04 on the other plate 1 may protrude along the bottom direction of the plate body 01.

During the process of using the plate assembly provided in this embodiment to produce a heat exchanger, the first flow channel 3 and the second flow channel 4 can be blocked through welding the paired pipeline sections 04 to each other. The connection between two pipeline sections 04 can be a surface-to-surface contact connection, which is equivalent to the welding between the plates. Based on the welding of the two pipeline sections 04, the two plates 1 can be welded, and it is not necessary to ensure the assembly accuracy of perpendicularity of the pipeline section 04 and the like at all times. Compared with the annular ring welding of the submerged tube, the weldable area between the two pipeline sections 04 is larger, so the requirement for assembly is low. The welding is on the plane and is easy to operate and control. Therefore, it can easily ensure the welding quality between the contact portion and the contact portion, so that the pass rate of the heat exchanger can be improved.

As shown in FIG. 5, a heat exchanger provided by the present disclosure may include a plurality of plate assemblies provided in the present disclosure. The plurality of plate assemblies can be provided as stacked; and the pipeline sections 04 in the plurality of plate assemblies can be communicated in sequence to form the first flow channel 3. The second through holes 03 in the plurality of plate assemblies can be communicated to form the second flow channel 4.

In this embodiment, optionally, in the process of stacking and welding a plurality of plates in pair (plate assembly) into a whole, the two pipeline sections 04 in the pair of plates can be welded, and the plurality of pipeline sections 04 can be connected to each other to form an integral first flow channel 3. The plurality of second through holes 03 can be communicated to each other to form a second flow channel 4, and the first flow channel 3 and the second flow channel 4 can be blocked from each other in a direction perpendicular to the stacking direction of the plates 1, so the flows of the fluid in the first flow channel 3 and the second flow channel 4 may not interfere with each other.

In the process of producing and manufacturing the heat exchanger provided in this embodiment, the first flow channel 3 and the second flow channel 4 can be blocked through welding the pair of pipeline sections 04 to each other, and the pipeline sections 04 may form surface-to-surface contact connection, which is equivalent to the welding between the plate and the plate. The welding of the two pipeline sections 04 can be realized on the basis of the welding of the two plates 1, which can eliminate the need to guarantee the assembly accuracy such as the verticality of the pipeline section at all times. Compared with the annular ring welding of the submerged tube, the weldable area between the two blocked portions is larger, so the requirement for assembly is low. The welding is on the plane and is easy to operate and control. Therefore, it can easily ensure the welding quality between the contact portion and the contact portion, so that the pass rate of the heat exchanger can be improved.

As shown in FIGS. 5 and 6, optionally, the heat exchanger may also include a plurality of bottom plates 2, and the plurality of bottom plates 2 are stacked and arranged under the plurality of plate assemblies. The plurality of plate assemblies and the plurality of bottom plates 2 may form a plurality of first fluid channels for the flowing of the first fluid. Regarding the bottom plate and the first fluid channels, the arrangement of them will be described in detail below.

Optionally, every two bottom plates 2 can be arranged in pair. One corner of the bottom plate 2 can be provided with a third through hole 05, and a plurality of third through holes 05 can be communicated to form a third flow channel 5. The third flow channel 5 may be blocked from the second flow channel 4 in the stacking direction and communicate with the first flow channel 3. A corner of the plate 1 that is away from the second through hole 03 along the long side of the rectangular plate 1 and a corner of the bottom plate 2 that is away from the third through hole 05 along the long side of the rectangular plate 1 can be both provided with a fourth through hole 06 and a plurality of fourth through holes 06 may form the fourth flow channel 6. This structure can realize multiple process sections of the first fluid, thereby improving the heat exchange efficiency.

Optionally, as shown in FIG. 7, the uppermost one of the bottom plates 2 of the plurality of plates 1 may be provided with a cover plate 8, and the cover plate 8 may seal the second through hole 03, so that the second flow channel 4 and the third flow channel 5 are blocked (separated) in the stacking direction. For example, the cover plate can be realized by the plate 1 not provided with the second through hole. In this embodiment, optionally, the second through hole 03 can be sealed by the cover plate 8, and the cover plate 8 can be arranged on the plate 1, without the need for plug-in cooperation between the two components, which can easily ensure the sealing effect.

Optionally, the cover plate 8 can be snapped with or welded to the plate 1. Optionally, the cover plate 8 can be integrally formed with the plate 1 to facilitate the processing and avoid the later assembly and installation.

Optionally, the heat exchanger may further include a top plate, and the top plate may be provided with a first fluid inlet 111 and a first fluid outlet 112.

In this embodiment, optionally, the first flow channel 3 may be directly communicated with the first fluid inlet 111, that is, the first flow channel 3 may be used as a channel for introducing the first fluid. Specifically, the first fluid can enter the third flow channel 5 through being guided by the first flow channel 3, and then is distributed through the third flow channel 5 into the plurality of first fluid channels which are communicated between the third flow channel 5 and the fourth flow channel 6 formed by the plurality of fourth through holes 06, and then enters the fourth flow channel 6, and then enters the second flow channel 4 through the plurality of first fluid channels communicated between the fourth flow channel 6 and the second flow channel 4, and finally is discharged through the second flow channel 4. In the whole process, the first fluid can pass through two process sections. The first process section can be a plurality of first fluid channels connected between the third flow channel 5 and the fourth flow channel 6, and the second process section (flow stage) can be a plurality of first fluid channels connected between the fourth flow channel 6 and the second flow channel 4.

Optionally, the first flow channel 3 can also be directly communicated to the first fluid outlet 112. As the final stage of first fluid flowing in the heat exchanger, the first flow channel 3 can be used to export to the first fluid outlet 112 the first fluid that has completed the heat exchange, and then it is discharged from the heat exchanger through the first fluid outlet 112. Specifically, the second flow channel 4 can be directly communicated to the first fluid inlet 111, and the first fluid can enter the second flow channel 4 through the first fluid inlet 111, and then be distributed through the second flow channel 4 to the first fluid channels connected between the second flow channel 4 and the fourth flow channel 6, then enters the fourth flow channel 6, and then enters the first fluid channels connected between the fourth flow channel 6 and the third flow channel 5 via the fourth flow channel 6, and enters the third flow channel 5, then enters the first flow channel 3 through the third flow channel 5, and then enters the first fluid outlet 112 through the first flow channel 3, and is finally discharged from the heat exchanger.

As shown in FIGS. 5 and 9, optionally, a turning member may be provided in the fourth flow channel 6 to divide the fourth flow channel 6 into a fifth flow channel 7 and a sixth flow channel 7′ in the stacking direction of the plates 1. Optionally, the fifth flow channel 7 is located above the sixth flow channel 7′. Each pair of plates 1 and each pair of bottom plates 2 can both form a first fluid channel, and the plurality of first fluid channels can be divided into a first channel segment 10 and a second channel segment 11 and the third channel segment 12 from bottom to top. Optionally, the first channel segment 10 may be between the third flow channel 5 and the lower part of the sixth flow channel 7′, that is, the third flow channel 5 may communicate with the lower part of the sixth flow channel 7′ through the first channel segment 10. The second channel segment 11 can be between the lower part of the second flow channel 4 and the upper part of the sixth flow channel 7′, that is, the lower part of the second flow channel 4 can communicate with the upper part of the sixth flow channel 7′ through the second channel segment 11. The third channel segment 12 may be between the upper part of the second flow channel 4 and the fifth flow channel 7, that is, the upper part of the second flow channel 4 may communicate with the fifth flow channel 7 through the third channel segment 12.

In this embodiment, optionally, the first flow channel 3 can be directly communicated to the first fluid inlet 111, that is, the first fluid can first enter the first flow channel 3 through the first fluid inlet 111, and the fifth flow channel 7 can be directly communicated to the first fluid outlet. Optionally, after the first fluid enters the first flow channel 3, it may enter the third flow channel 5 through the first flow channel 3, and then be distributed to the plurality of first fluid channels in the first channel segment 10 through the third flow channel 5, and then merge, through the first channel segment 10, into a part of the sixth flow channel, and then be distributed to the plurality of first fluid channels in the second channel segment 11 through another part of the sixth flow channel, and then merge into the second flow channel 4, and then it is distributed to the plurality of first fluid channels in the third channel segment 12 through the second flow channel 4, then merges into the fifth flow channel 7, then enters the first fluid outlet 112 through the fifth flow channel 7, and finally is led out through the first fluid outlet 112. The first fluid can flow, meandering like an “S” in the heat exchanger, which increases the flow speed of the fluid and enhances the heat exchange capacity. In addition, the amount of the flow that passes through the channel segment of the plate 1 at one time is reduced, which makes it easier for the first fluid to evenly distribute the flow in the channels between the plates 1, thereby improving the heat exchange capacity.

Optionally, the first flow channel 3 may also be directly communicated to the first fluid outlet 112, and the fifth flow channel 7 may also be directly communicated to the first fluid inlet 111. Optionally, the first fluid may first enter the fifth flow channel 7 through the first fluid inlet 111, and then be distributed to the plurality of first fluid channels in the third channel segment 12 through the fifth flow channel 7, and then merge into the second flow channel 4, and then be distributed to the plurality of first fluid channels in the second channel segment 11, and then merge into the sixth flow channel, and then be distributed to the plurality of first fluid channels in the first channel segment 10, and then merge into the third flow channel 5, then enter the first flow channel 3, enter the first fluid outlet 112 via the first flow channel 3, and be finally discharged. The first fluid can flow, meandering like an “S” in the heat exchanger, which increases the flow speed of the fluid and enhances the heat exchange capacity. In addition, the amount of the flow that passes through the channel segment of the plates 1 at one time is reduced, which makes it easier for the first fluid to evenly distribute the flow in the channels between the plates 1, thereby improving the heat exchange capacity.

Optionally, at least two numbers of the number of first fluid channels of the first channel segment 10, the number of first fluid channels of the second channel segment 11, and the number of first fluid channels of the third channel segment 12 may be the same.

Optionally, the number of first fluid channels in the first channel segment 10, the number of first fluid channels in the second channel segment 11, and the number of first fluid channels in the third channel segment 12 may be sequentially increased. For example, the number of first fluid channels of the first channel segment 10 is less than the number of first fluid channels of the second channel segment 11, and the number of first fluid channels in the second channel segment 11 is less than the number of first fluid channels in the third channel segment 12.

Optionally, when the heat exchanger provided in this embodiment is applied to evaporative heat exchange, the first fluid may be a mixed fluid of liquid and gas at the inlet, and the liquid, after passing through the heat exchange channel, may slowly evaporate into gas and then the speed of first fluid will get faster and faster, and thanks to the numbers of the three, it can ensure that the first fluid can fully undergo heat exchange even at a fast flow rate.

Optionally, the turning member can be of multiple structural forms, and for example, the turning member can be a turning wheel, and the turning wheel can abut and be fixed to the inner wall of the fourth flow channel 6, that is, the turning wheel can abut and be fixed to the side wall of the fourth through hole 06, such that the fourth flow channel 6 can be divided into two chambers in the stacking direction to form a fifth flow channel 7 and a sixth flow channel 7′.

Optionally, as shown in FIG. 8, the turning member may be a turning plate 9, and the turning plate 9 may be disposed on one first plate of the plurality of first plates 1, for example, located at a middle position of the plurality of first plates 1, so as to seal the fourth through hole 06 on the one first plate. In this embodiment, optionally, the turning plate 9 can be fixedly connected to the first plate 1. Then, in the process of stacking and connecting a plurality of plates 1, the installation of the turning plate 9 can be completed, avoiding the separate installation of the turning member, which further facilitates the processing and manufacturing of the heat exchanger.

Optionally, the turning plate 9 can be snapped with or welded with the first plate 1. Optionally, the turning plate 9 can be integrally formed with the first plate 1 to further facilitate processing and manufacturing.

As shown in FIGS. 5 and 10, optionally, a second fluid inlet 113 and a second fluid outlet 114 may be provided on the top plate located on the top of the plurality of first plates 1, and the first fluid inlet 111 may be communicated with the first flow channel 3. As shown in FIG. 5, the first fluid inlet 111 and the second fluid inlet 113 may be provided at one end of the top plate, and the first fluid outlet 112 and the second fluid outlet 114 may be provided at the other end of the top plate.

Optionally, a corner of the plate 1 away from the second through hole 03 along the short side of the rectangular plate 1 and a corner of the bottom plate 2 away from the third through hole 05 along the short side of the rectangular plate 1 may be both provided with a fifth through hole 07, and a corner of the plate 1 away from the second through hole 03 along the diagonal line of the rectangular plate 1 and a corner of the bottom plate 2 away from the third through hole 05 along the diagonal line of the rectangular plate 1 may be both provided with a sixth through hole 08. The plurality of fifth through holes 07 of the plurality of plates 1 and the plurality of bottom plates 2 can communicate with each other, and form a second fluid introduction channel, in combination with the first plate 1 and the bottom plate 2, with second fluid introduction channel used for introducing the second fluid. The plurality of sixth through holes 08 of the plurality of plates 1 and the plurality of bottom plates 2 can communicate with each other, and form a second fluid exporting channel, in combination with the first plate 1 and the bottom plate 2, with second fluid exporting channel used for exporting the second fluid. The second fluid introduction channel may be in communication with the second fluid inlet 113, and the second fluid exporting channel may be in communication with the second fluid outlet 114.

Optionally, all the second fluid channels can be connected between the second fluid introduction channel and the second fluid exporting channel, that is, the second fluid has only one process section, and the second fluid can be distributed to individual second fluid channels just after entering the second fluid introduction channel, then merges into the second fluid exporting channel, and finally is exported through the second fluid outlet 114.

Specifically, a first fluid channel can be formed between the two plates 1 in the plates 1 in pair, and similarly, a first fluid channel can be formed between the two bottom plates 2 in the bottom plates 2 in pair. A second fluid channel can be formed between two adjacent plates 1 in pair, and a second fluid channel can also be formed between two adjacent bottom plates 2 in pair. The detailed description below may be referred to for the formation of these channels. Both the plates 1 in pair and the bottom plates 2 in pair may be multiple, so that a plurality of first fluid channels and a plurality of second fluid channels can be formed, and the first fluid channels and the second fluid channels can be alternately arranged.

Specifically, the plates 1 may be formed in a rectangular shape. In a pair of plates 1, one may be plate A and the other may be plate B. Optionally, the first corner of the plate A can be provided with a first recess, and the second corner on the same side can be provided with a second recess, and both the first recess and the second recess can protrude outside the plate A. The fifth through hole 07 can be arranged in the first recess, the sixth through hole 08 can be arranged in the second recess, the first through hole 02 and the second through hole 03 can be arranged at the third corner, and the fourth through hole 06 can be arranged in the fourth corner.

Optionally, the first corner of the plate B may be provided with a fifth through hole 07, the second corner may be provided with a sixth through hole 08, the third corner may be provided with a third recess, and the fourth corner may be provided with a fourth recess. The third recess and the fourth recess can both protrude outside the plate B, the first through hole 02 and the second through hole 03 can be arranged in the third recess, and the fourth through hole 06 can be arranged in the fourth recess.

During welding, the plate A can be located above plate B, the first recess on the plate A can abut against the plate B, and the second recess on the plate A can abut against the plate B, that is, edges of two fifth through holes 07 abut against each other, and the edges of two sixth through holes 08 abut against each other. There may be a spacing, equal to the depth of the third recess, between the second through hole 03 of the plate A and the second through hole 03 of the plate B, and similarly, there may be a spacing, equal to the depth of the fourth recess, between the fourth through hole 06 of the plate A and the fourth through hole 06 of the plate B. After welding, a fluid channel can be formed between the two plates 1, and this fluid channel can be directly communicated with the first through hole 02 and the fourth through hole 06 to realize the flowing of the first fluid. The fluid channel can be the first fluid channel.

Optionally, in the two adjacently arranged plates 1 in pair, the plate B of the pair of plates 1 located above can be connected to the plate A of the pair of plates 1 located below, and similarly, it can be known that the fluid channel is formed between two plates in pair. At this time, the fifth through hole 07 and the sixth through hole 08 can communicate with the fluid channel, and the fluid channel can be the second fluid channel.

Optionally, in the bottom plates 2 in pair, both the first corner and the second corner of one bottom plate 2 can be provided with a recess, and the fifth through hole 07 and the sixth through hole 08 can both be arranged in the recess. Both the third corner and the fourth corner of the other bottom plate 2 can be provided with a recess. Both the third through hole 05 and the fourth through hole 06 can be provided in the recess, and the recess can protrude out from the bottom plate 2. The principle that the plurality of bottom plates 2 in pair form the first fluid channel and the second fluid channel may be the same as the principle of the plurality of plates 1 in pair.

Optionally, the third through hole 05, the fourth through hole 06, the fifth through hole 07, and the sixth through hole 08 on the bottom plate 2 can be arranged completely symmetrically, so that there is no need to distinguish the bottom plate 2. It is enough that two corners are provided with a recess, and the two through holes can be respectively arranged in the recesses. During the installation process, the bottom plate 2 is rotated by 180 degrees, which can form the bottom plate 2 in pair.

The heat exchanger provided by the present disclosure can be applied in many fields, especially suitable for evaporative heat exchange, and is suitable for evaporators. At this time, optionally, the first fluid can be a refrigerant, and the second fluid can be water or the water containing antifreeze liquid. Generally, the first fluid can absorb the heat of the second fluid to lower the temperature of the second fluid, and the cooled second fluid can be used as a coolant to further cool other components, such as, cooling the battery of a hybrid or pure electric vehicle.

As shown in FIG. 11, optionally, the heat exchanger can also be used in combination with a thermal expansion valve, which specifically can include a thermal expansion valve 116, a connection block 115, and the heat exchanger provided in the present disclosure. The connection block 115 can include a first channel and a second channel, which are blocked from each other. One end of the first channel can communicate with the inlet of the thermal expansion valve 116, and the other end thereof can communicate with the first fluid inlet 111. One end of the second channel can communicate with the outlet of the thermal expansion valve 116, and the other end thereof can communicate with the first fluid outlet 112, which avoids, at the other side of the heat exchanger (the side opposite to the top plate), the first fluid from being introduced from the first fluid outlet 112 to the outlet of the thermal expansion valve 116 by means of a pipe or other guiding device, which is of the compact structure and saves space.

The above are only the preferred embodiments of the present disclosure and not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc., made within the spirit and principle of the present disclosure, shall be included in the protection scope of the present disclosure.

In addition, those skilled in the art can understand that although some of the above-mentioned embodiments comprise certain features included in other embodiments, rather than other features, the combination of features of different embodiments means that it is within the scope of the present application, and the combination forms a different embodiment. For example, in the claims, any one of the claimed embodiments can be used in any combination. In addition, the information disclosed in the background section is only intended to deepen the understanding of the overall background technology of the present disclosure, and should not be regarded as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

INDUSTRIAL APPLICABILITY

In the process of connecting the plates provided by the embodiments of the present disclosure to form the first flow channel, there is no need to maintain a high perpendicularity or assembly accuracy of the pipeline section at all times during the welding process, and it only needs to ensure that two adjacent pipeline sections are connected to each other. Therefore, it has low requirements for assembly accuracy, facilitates welding, makes welding easy to operate and control, and can easily guarantee the welding quality between the two pipeline sections, so as to improve the pass rate (yield) of the heat exchangers. 

1. A plate, comprising a plate body and a first through hole and a second through hole provided on the plate body, with the plate body forming a pipeline section around the first through hole; and the second through hole arranged close to an outer periphery of the pipeline section.
 2. The plate according to claim 1, wherein the pipeline section is formed by a flange of an edge of the first through hole.
 3. The plate according to claim 2, wherein the flange is of a one-time flanging structure, and the flange is perpendicular to a plane of the plate body.
 4. The plate according to claim 2, wherein the flange is of a second-time flanging structure, and the flange at an end is parallel to a plane of the plate body.
 5. The plate according to claim 1, wherein the pipeline section protrudes upwards or protrudes downwards.
 6. The plate according to claim 1, wherein a plurality of second through holes are provided, and the plurality of second through holes are arranged around the pipeline section.
 7. The plate according to claim 1, wherein a ratio of a flow area of the first through hole to a flow area of the second through hole is not greater than 1:1.
 8. A plate assembly, comprising two plates according to claim 1, wherein the two plates are stacked, and pipeline sections of the two plates protrude toward each other and realize a surface contact connection.
 9. A heat exchanger, comprising a plurality of plate assemblies according to claim 8, wherein the plurality of plate assemblies are provided as stacked; and the channel segments in the plurality of plate assemblies are sequentially communicated to form a first flow channel; and second through holes in the plurality of plate assemblies are communicated to form a second flow channel.
 10. The heat exchanger according to claim 9, wherein the heat exchanger further comprises a first fluid inlet and a first fluid outlet; and the first flow channel is connected to the first fluid inlet, or the first flow channel is connected with the first fluid outlet.
 11. The heat exchanger according to claim 9, wherein the first flow channel and the second flow channel are blocked from each other in a direction perpendicular to a stacking direction of the plate assemblies.
 12. The heat exchanger according to claim 9, wherein the heat exchanger further comprises a plurality of bottom plates, and the plurality of bottom plates are stacked and provided below the plurality of plate assemblies, each of the bottom plates is provided thereon with a third through hole, and third through holes of the plurality of bottom plates are communicated to form a third flow channel, and the third flow channel is communicated to the first flow channel.
 13. The heat exchanger according to claim 12, wherein each of the bottom plates is further provided with a fourth through hole, and fourth through holes of the plurality of bottom plates are communicated to form a fourth flow channel.
 14. The heat exchanger according to claim 13, wherein a turning member is provided in the fourth flow channel to divide the fourth flow channel into a fifth flow channel and a sixth flow channel in a stacking direction of the plate assemblies, wherein the fifth flow channel is located above the sixth flow channel.
 15. The heat exchanger according to claim 9, wherein each of the plate assemblies forms one first fluid channel, and each pair of bottom plates forms one first fluid channel; and a plurality of first fluid channels are divided, from bottom to top, into a first channel segment, a second channel segment and a third channel segment.
 16. The heat exchanger according to claim 15, wherein the first channel segment is located between the third flow channel and a lower part of the sixth flow channel, and the second channel segment is located between a lower part of the second flow channel and a upper part of the sixth flow channel, and the third channel segment is located between a upper part of the second flow channel and the fifth flow channel.
 17. The heat exchanger according to claim 16, wherein at least two numbers of number of the first fluid channels of the first channel segment, number of the first fluid channels of the second channel segment and number of the first fluid channels of the third channel segment are same.
 18. The heat exchanger according to claim 16, wherein number of the first fluid channels of the first channel segment, number of the first fluid channels of the second channel segment and number of the first fluid channels of the third channel segment are in order of being increased sequentially.
 19. The heat exchanger according to claim 9, wherein one second fluid channel is formed between adjacent plate assemblies, and one second fluid channel is formed between two adjacent bottom plates in pair.
 20. The heat exchanger according to claim 19, wherein the plurality of first fluid channels and a plurality of second fluid channels are alternately arranged. 